What are the common diseases of Angelica sinensis? How to prevent? Farming precautions attached

Angelica sinensis is very common and important in life, with strong efficacy and high economic value. The market demand of Angelica sinensis is very large, but diseases will affect the yield and quality of Angelica sinensis. What are the common diseases of Angelica sinensis? How to prevent and cure?

What are the common diseases of Angelica sinensis

1. Root rot

Root rot disease, as the name implies, mainly harms the root system of planting, the root system of the plant is brown when the disease occurs, and gradually decays into black water immersion with the aggravation of the disease, and finally the plant leaves gradually wither and yellow, which leads to the death of the plant.

Control methods: select the cultivation land with good soil drainage and good air permeability, the cultivation land should be ploughed once every two years, avoid continuous cropping, disinfect the soil and seeds before planting, disinfect the soil and seeds in time, remove the diseased plants in time, and then destroy them. Disinfect the area around the diseased plant to prevent the spread of the virus.

2. Powdery mildew

At the beginning of the onset of powdery mildew, the leaves began to appear gray and powdery disease spots, with the passage of time, the leaves gradually appeared small black particles, and finally the leaves were covered with powdery mildew, and the plants slowly withered.

Control methods: disinfect the seeds and soil before planting, remove the diseased plants and burn them in time after discovering the disease, avoid continuous cropping, and it is best to rotate the disease. at the initial stage of the disease, the disease can be controlled by continuous spraying with 500 times solution of Dysen zinc.

3. Sclerotinia disease

At the initial stage of the onset of Sclerotinia sclerotiorum, the leaves began to turn yellow and the roots began to rot slowly, which was similar to that of root rot, but its root system looked normal on the outside, but it had rotted into a hollow inside, and there were many small black granular sclerotia in the cavity.

Prevention and control methods: disinfect seeds and soil before planting, family lime or plant ash can be found in the planting hole, and the diseased plants can be treated in the same way as before. at the initial stage of the disease, continuous spraying of 500 times solution of Dysen zinc can be used to control the disease.

4. Rust

Rust is mainly dangerous temperature and warm damage leaves, when the disease occurs, the leaves appear rust color irregular disease spots, and there are rust color powder, rust is extremely harmful, its spore vitality is extremely strong, it can survive in the environment, can be repeatedly infected many times, the spread speed is extremely fast, and the injured area is positive and wide.

Prevention and control method: burn the diseased leaves of the residual plants after harvest, which can reduce the source of bacteria, and spray with 2000 times solution of 25% wettable powder at the initial stage of the disease.

Matters needing attention in aquaculture

1. Growth environment

Angelica sinensis is suitable to grow in areas with higher altitude, and lower altitude will affect the yield. Moreover, the quality is also poor, and it is easy to cause bolting in advance. Angelica sinensis in Minxian County is world-famous, just because it is planted in areas above 2400 meters above sea level, so its quality and yield are far higher than those planted in other areas.

2. Soil and fertilization

Angelica likes fertile and loose, good drainage humus soil, this kind of soil can provide the nutrients needed for the growth of Angelica sinensis, at the same time, Angelica sinensis is a fertilizer-loving plant, which has a huge demand for fertility. Nitrogen fertilizer can promote plant growth and increase organic matter accumulation; phosphorus fertilizer can strengthen the root system and improve the absorption of nutrients and water; potassium fertilizer can promote photosynthesis and improve the quality of Angelica sinensis. Therefore, rational fertilization is important, especially the application of phosphorus and potassium fertilizer in the later stage can improve the quality and yield of Angelica sinensis.

3. Temperature

Angelica sinensis is suitable to grow in areas with high altitude, so it is suitable for high and cold temperature conditions, and it is more sensitive to temperature. The best suitable temperature for growth is between 20 and 24 degrees, which can be maintained at the seedling stage to allow it to emerge quickly.

4. Lighting

Angelica sinensis is a light-loving plant, which grows fast and strong under sufficient light, and it is also easy to bolt. lack of light will affect the yield of Angelica sinensis. Therefore, the sunny sloping land is selected when planting, and the planting density is adjusted properly when planting, which is beneficial to the root growth.